Meaning

adjective tending to increase knowledge or dissipate ignorance

adjective serving to instruct or enlighten or inform

adjective providing or conveying information

originEtymology tree English inform Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-tós Proto-Indo-European *-eh₂tos Proto-Italic *-ātos Latin -ātuslbor. English -ate Proto-Indo-European *-wós Proto-Indo-European *-iHwósder. Latin -īvus Old French -ifbor. Middle English -yf English -ive English -ative English informative From inform + -ative.

Etymology from Wiktionary, CC BY-SA 3.0